6533b82bfe1ef96bd128df20

RESEARCH PRODUCT

Non-hindered ansasamarocenes, versatile catalysts for diene/olefin/polar monomer copolymerisations. What is really the active species?

Alain DormondMarc VisseauxBruno DomenichiniDenise Barbier-baudryFanny Bonnet

subject

Olefin fiberDieneOrganic Chemistrychemistry.chemical_elementBiochemistryChlorideCatalysisInorganic Chemistrychemistry.chemical_compoundMonomerchemistryPolymerizationPolycaprolactoneMaterials ChemistrymedicineOrganic chemistryLithiumPhysical and Theoretical Chemistrymedicine.drug

description

Abstract Catalytic systems containing an ansabiscyclopentadienyllanthanide core and lithium and/or magnesium salts are obtained by reaction of the chloride precursors with allyllithium. These allyl complexes lead to the same active species which polymerises 1,3-dienes, copolymerises 1,3-dienes and α-olefin or α,ω-dienes or allows the controlled diblock polyisoprene/polycaprolactone copolymerisation. The exact nature of this active species and of the allyl precursors is investigated here.

https://doi.org/10.1016/s0022-328x(01)01476-0